Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6669740 | Dye preparations comprising azo dyes | Karl Siemensmeyer, Bernd Siegel, Volker Bach, Manfred Herrmann, Rudiger Sens | 2003-12-30 |
| 6537331 | Dye preparations containing azo dyes | Karl Siemensmeyer, Bernd Siegel, Volker Bach, Manfred Herrmann, Rudiger Sens | 2003-03-25 |